摘要
为研究砂砾岩致密油藏超临界CO2吞吐效果,基于M油田砂砾岩致密油藏岩储层条件室内模拟超临界CO2吞吐饱和油岩心、含束缚水饱和油岩心。通过吞吐前后岩心中采出油量、采出油组分变化、吞吐前后油相渗透率变化得出:束缚水存在增加了超临界CO2吞吐采出流体量但降低了原油的采收率,同时减弱了CO2对原油的萃取能力,使得采出油组分变轻,CO2萃取原油组分区间为C12~C21;CO2与地层水作用产生沉淀现象是导致吞吐后岩心油相渗透率下降的主要原因,CO2与水作用强度大于与原油作用强度。
To study the effect of supercritical CO2 huff and puff in tight glutenite reservoirs, the saturated oil core and that with irreducible water were simulated based on the reservoir conditions of tight glutenite reservoir in the M oilfield. By studying the changes in oil production volume, oil components, and oil phase permeability before and after huff and puff, it was concluded that the existence of bound water increased the fluid volume produced by supercritical CO2 huff and puff, but reduced the oil recovery, and weakened the extraction ability of CO2 to crude oil, making the oil components produced lighter. The interval of CO2 extracted crude oil components was C12~C21. The precipitation caused by the interaction of CO2 and formation water was the main reason for the decrease of core oil permeability after huff and puff. The interaction intensity of CO2 and water was greater than that of crude oil.
作者
施雷庭
张玉龙
户海胜
张景
高阳
张恒
王路
SHI Lei-ting;ZHANG Yu-long;HU Hai-sheng;ZHANG Jing;GAO Yang;ZHANG Heng;WANG Lu(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China;Research Institute of Exploration and Development,Xinjiang Oilfield Company,Petro China,Karamay 834000,China)
出处
《科学技术与工程》
北大核心
2020年第9期3598-3604,共7页
Science Technology and Engineering
基金
准噶尔盆地致密油开发示范工程(2017ZX05070)。
关键词
超临界CO2吞吐
砂砾岩致密油藏
采收率
原油组分
supercritical CO2 huff and puff
tight glutenite reservoir
recovery factor
crude oil composition
